LoadTester

LoadTester is a modern, cloud-native HTTP and API load testing tool built by Cloud Native d.o.o. that lets you run serious performance tests without the headache of setting up or managing any infrastructure. Think of it as your go-to platform for catching performance regressions before your users even notice them. It's designed for engineering teams who need repeatable, reliable performance checks but don't want to deal with the boilerplate of traditional load testing setups. You create a test scenario, choose your virtual users or requests per second, and hit go. The system handles the rest, spinning up distributed workers in under three seconds and serving live analytics on latency, error rates, throughput, and more. It's built for scale, supporting up to 10,000 virtual users and 10,000 requests per second in a single test. You can run tests from your browser or integrate them into your CI/CD pipeline for automated checks on every deploy. Features like smart auto-stop thresholds, run-to-run comparisons, scheduled baselines, and exports in PDF, CSV, or JSON make it a powerhouse for teams that want simple, repeatable performance checks without the platform ceremony.

Instant Distributed Execution

Stop waiting for infrastructure to spin up. LoadTester boots your distributed load test in under three seconds from cold start. No need to provision servers, manage worker pools, or deal with scheduling headaches. The platform auto-scales workers across the globe, so you can focus on the test results, not the orchestration. You set the parameters, hit run, and within seconds you're watching live data stream in from multiple workers hammering your endpoints.

Live Real-Time Analytics

While your test is running, you get a live dashboard that shows you the numbers that actually matter. Watch throughput (RPS), latency at p50, p95, and p99, active virtual users, and error rates update in real time. No waiting five minutes for a report to generate. You can see exactly how your API behaves under load as it happens, making it easy to spot bottlenecks, memory leaks, or slowdowns the moment they appear.

Smart Auto-Stop Thresholds

Set failure or latency thresholds before you even start the test, and LoadTester will automatically stop the run if things go sideways. For example, you can set a rule that says "auto-stop if p95 latency exceeds 400ms" or "auto-stop if error rate goes above 2%." This saves you from burning through your test budget or accidentally DDoS-ing your own staging environment. It's a safety net that lets you run aggressive tests without fear.

CI/CD Integrations and Automation

LoadTester is built to slot right into your existing workflow. Run tests on every deploy via API access, webhooks, Slack alerts, and email notifications. You can set up scheduled tests that run daily or on a cron schedule, compare runs against a baseline to catch regressions, and even trigger webhooks on completion to post result links to your release bot. It's the kind of automation that makes performance testing a natural part of your deployment pipeline, not an afterthought.

Pre-Release Performance Gates

Before you ship a new feature or a major update, run a load test against your staging or production endpoint to make sure it can handle the expected traffic. Set thresholds for p95 latency and error rate, and if the test fails, the deployment gets blocked automatically. This is the ultimate safety net for teams that want to catch performance regressions before users ever experience them.

Spike and Stress Testing for High-Traffic Events

Running a Black Friday sale, a product launch, or a viral marketing campaign? Use LoadTester to simulate thousands of concurrent users hitting your checkout flow or landing page. Watch live as your system handles the spike, and use the smart auto-stop feature to prevent any real-world damage. The tool helps you prove capacity before the big moment, so you can ship with confidence.

Baseline Monitoring and Regression Detection

Set up a scheduled test that runs every night against your critical API endpoints. LoadTester will automatically compare the results against a stored baseline, flagging any significant deviations in latency, throughput, or error rate. If a recent code change introduced a slowdown, you'll get a Slack notification before your users start complaining. It's like having a performance watchdog that never sleeps.

CI/CD Pipeline Integration for Continuous Testing

Integrate LoadTester directly into your GitHub Actions, GitLab CI, or Jenkins pipeline. Every time a developer pushes a commit, the pipeline triggers a quick load test against the new code. If the test passes all thresholds, the build proceeds. If it fails, the pipeline stops and alerts the team. This makes performance testing a seamless part of your development lifecycle, ensuring every merge is performance-verified.

Do I need to set up any infrastructure to use LoadTester?

Nope. That's literally the whole point. You don't need to provision servers, manage worker pools, or configure any cloud infrastructure. LoadTester handles all the distributed worker scaling and orchestration behind the scenes. You just create a test, set your parameters, and hit run. The system boots up workers in under three seconds and starts sending traffic to your endpoints.

Can I run tests from my CI/CD pipeline?

Yes, absolutely. LoadTester is built for automation. You can trigger tests via API calls, set up scheduled runs, and integrate with tools like GitHub Actions, GitLab CI, Jenkins, and more. The platform also supports webhooks on completion, so you can send results to Slack, email, or your release bot. It's designed to make performance testing a natural part of your deployment pipeline.

What kind of metrics can I see during a live test?

You get real-time visibility into requests per second (RPS), latency at the p50, p95, and p99 percentiles, active virtual users, error counts and rates, data sent and received, and a live latency distribution chart. All of this updates in real time while the test is running, so you can spot issues immediately. After the test, you get a clean summary with total requests, average latency, and shareable exports.

How many virtual users or requests per second can I simulate?

LoadTester supports up to 10,000 virtual users and 10,000 requests per second in a single test. The platform is built for scale and can handle enterprise-level load testing scenarios. If you need more, you can always run multiple tests in parallel or contact the team for custom enterprise options. The system auto-scales workers to handle the load you throw at it.

LoadTester offers a free plan that lets you start running tests immediately with no credit card required. The free tier includes access to the core features, live analytics, and a limited number of test runs per month. For teams that need more, there are paid plans that unlock higher limits on virtual users, requests per second, concurrent tests, scheduled runs, and advanced integrations like API access and webhooks. Specific pricing tiers and costs are not listed in the provided content, but you can check the pricing page on the LoadTester website for the latest details.